Rumors that Khloe Kardashian's marriage to Lamar Odom was on the rocks intensified over the weekend, when TMZ reported that the 33-year-old Los Angeles Clippers player had a serious drug problem.

Kardashian even hired a private investigator to make sure her husband went to rehab, the report alleged.

"Our sources say Lamar constantly threatened to leave and Khloe made several visits to prevail upon him to stay. We're told after 3 weeks, Lamar left for good," the gossip site said.

The drug abuse allegations come after weeks of rumors that Odom cheated on his wife with an attorney named Polina Polonsky.

Though the 29-year-old television personality has kept quiet about split reports -- favoring more cryptic tweets about strength and privacy -- she finally fired back in an expletive-laden tweet on Sunday.

"Really hard to sit here and listen to people talk sh** about my family!" Kardashian tweeted. F*** you and shame on you! I'm too protective for this sh**!

United Press International is a leading provider of news, photos and information to millions of readers around the globe via UPI.com and its licensing services.

With a history of reliable reporting dating back to 1907, today's UPI is a credible source for the most important stories of the day, continually updated - a one-stop site for U.S. and world news, as well as entertainment, trends, science, health and stunning photography. UPI also provides insightful reports on key topics of geopolitical importance, including energy and security.

A Spanish version of the site reaches millions of readers in Latin America and beyond.

UPI was founded in 1907 by E.W. Scripps as the United Press (UP). It became known as UPI after a merger with the International News Service in 1958, which was founded in 1909 by William Randolph Hearst. Today, UPI is owned by News World Communications.